On the other thread we are starting a discussion on the warming periods over the last few millennia, and so I thought I put up the second of the youtube clips that deal with it. Note that the “Medieval Warming” was a local event, and that when global details are taken the warming disappears – at least that is what the US National Academy of Science seems to say. They were “critical of the process” but did confirm the findings.
Plimer has used the graph without acknowledging (to my knowledge as I am relying on others who have read the book) that the basic details of the “hockey graph” are actually supported by the evidence, whereas his graph showing the “medieval warming” has been discredited.
Filed under: climate change |